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November 14, 2017 10:05
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import Foundation | |
let tweet: String = "Detectar etiquetas y usuario en un tuit con #Swift. También podemos recoger los usuario como @fitomad o @AppStore. #SwiftLang #iOSDev #macOSDev" | |
// Estos caracteres no nos interesan... | |
var skip_set: CharacterSet = CharacterSet.whitespacesAndNewlines | |
skip_set.formUnion(CharacterSet.punctuationCharacters) | |
// ...excepto estos, que son para usuarios y etiquetas y no debemos excluirlos. | |
skip_set.remove(charactersIn: "@#_") | |
// Los caracteres de lo que buscamos (usuarios y etiquetas) | |
let twitter_set: CharacterSet = CharacterSet(charactersIn: "@#") | |
let scanner: Scanner = Scanner(string: tweet) | |
scanner.charactersToBeSkipped = skip_set | |
repeat | |
{ | |
_ = scanner.scanUpToCharactersFromSet(twitter_set) | |
if let twitter_token = scanner.scanUpToCharactersFromSet(skip_set) | |
{ | |
print(twitter_token) | |
} | |
} while !scanner.isAtEnd |
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